The stands which are still up were constructed as an airfoil from aerospace designs. The ice was made using 70 km (43 mi) of piping using R32 and brinerefrigeration to cool the track to between −5 and −8 °C (23 and 18 °F) with 4 cm-thick (1.6 in) ice. Before this the surface was covered with 1.20 m (3 ft 11 in) of base sand in order to lay down the piping.